[ts] undefined method `constantize' for nil:NilClass

[Oscar Del Ben]

Hi, I'm having troubles doing a search on multiple models with TS. If
I use this code in one of my controllers:

ThinkingSphinx.search("*a*")

I get the undefined method `constantize' for nil:NilClass error.

The nice thing is that it works fine in the console (always in
development mode), but not in the controller. These are my indexes:

define_index do
set_property :delta => true
indexes login, :sortable => true
indexes province
indexes country
indexes state
where "state in ('active', 'suspended')"
end

define_index do
set_property :delta => true
indexes :updated_at, :sortable => true
indexes :body_html
end

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[Oscar Del Ben]

Actually, if I set config.cache_classes = true in development.rb,
everything works fine.

[Pat Allan]

Hi Oscar

If you're happy with that setting being true, then I guess there's no problems... still, things should work either way. What version of Thinking Sphinx are you using?

--
Pat

[Oscar Del Ben]

Thinking Sphinx v1.3.16
sphinx @0.9.8.1_0 (active)

[Pat Allan]

Hmm, still not sure what the cause is. What version of Rails are you using?

--
Pat

[nruth]

I have the same behaviour now. It was quite confusing.

    rails (3.1.0)

  thinking-sphinx (= 2.0.5)

Cheers,

Nick

[Pat Allan]

Hi Nick

Did restarting Rails get things working again? Or is the problem persisting?

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Pat

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[nruth]

I've been disabling caching to get around the issue, but this is problematic because editing views and reloading the page becomes impossible (have to restart the webserver instead, much slower).

I think I've isolated the problem though. If I have my indices in class_eval blocks inside a rails initialiser (I want to index some models implemented in an engine -- specifically the radar/forem engine). When I comment out the eval blocks for ::Forem::Post and ::Forem::Topic, and move my own model's indices into the model file (where they normally go) then development mode etc works properly.

While this is fine for my own model files (personal preferences aside) I'm not sure how best to go about indexing the engine models.

Is this something you have any experience with?

It's not a disaster if not, it still works in production and test modes, just slows down styling the search results page.

Cheers,

Nick

[Pat Allan]

Hmm, I guess it's related to how TS detects indices. Can you shift the class_eval blocks into modules in a certain directory, and then add that directory path to ThinkingSphinx::Configuration.instance.model_directories in the initialiser instead?

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Pat

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[nruth]

That did the trick, thanks Pat!

Here's my layout:

app/indices/sphinx_indices.rb (could be more than 1 file, I am just being lazy and keeping what I had before)

  ::Forem::Post.class_eval do

    define_index do

      # fields

      indexes text, :sortable => false

      indexes user.username, :as => :author, :sortable => true

      # attributes

      has user_id, topic_id, created_at, updated_at

    end

  end

  … etc

config/initializers/thinking_sphinx.rb 

  ThinkingSphinx::Configuration.instance.model_directories << "app/indices"

and it now works in production with class caching, and development without class caching.

Cheers, 

Nick

[Pat Allan]

Great to hear Nick, and thanks for sharing the finer details of your solution :)

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Pat

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